I have been planning to build a new pumpkin lifting ring for a while now and have finally started the project this month. Last winter I purchased a machine called a Chinese Shoe Patcher so that I would be able to make my own straps for the lifter. This is basically a manual sewing machine that people use to sew leather and other heavy fabrics. These are very economical machines that can be purchased on Amazon. The only problem is they don’t work right out of the box. You have to disassemble the machine and cleanup/polish the castings with fine sandpaper. After that, apply some lubrication, adjust tension and timing and the machine works very well. They are operated by cranking the wheel on the right. I joined an online group that has a site that is dedicated to the setup and use of these machines. The thread we are using is a heavy duty polyester outdoor thread that is typically used for sails, boat covers, tents etc.
The first thing that I wanted to do was to prove that the machine would be capable of stitching a loop on a strap that would be strong enough. I plan to make the straps out of seatbelt material so I made up a test strap so that I could put it through a pull test. . A loop was stitched on each end.
After looking around the farm for something heavy I decided to attach the test strap to a large Walnut log and test the stitching. We have an electronic load cell scale and I attached it to the bottom of the test strap.
I kept applying upward pressure to the strap and to my surprise the log started to rise off the ground. I checked the digital readout and it was measuring over 1100 lbs. That will be more than enough, especially since we will be using 8 straps on the ring. The test strap showed no signs of any damage so I think the stitching passed the strength test.
Now I have to build the ring. I purchased some hot rolled flat bar and started the project. I could have use the acetylene torch to heat the bar but for a job like this I usually go to my grandfather’s old coal forge. I have many memories of my grandfather using this forge when I was a young lad. He would let me turn the crank on the blower to put air to the fire. I would watch in amazement as he would turn the red hot piece of iron into something useful. It’s funny how the distinctive odors and sounds from the forge bring back so many memories from the past.
Here I am trying to get things to line up.
Here is the ring just before I added the straps. I put the loops on the straps ahead of time to make the stitching easier. I then added the straps to the ring before welding everything solid. It would have been very difficult to stitch the straps while on the ring. I have seen that some lifting rings have their straps attached with buckles and sometimes tied in place, but I wanted them permanently stitched in place.
Here is a look at it after a coat of zesty orange paint.